ambassador susan rice. >> if senator mccain and senator graham and others want to go after somebody, they should go after me and i'm happy to have that discussion with them. >> reporter: republicans have gone after rice for her statements made after the attack on the u.s. diplomatic mission in benghazi. five days after the violence that killed ambassador chris stevens and three other americans, she attributed it to outrage in the arab world over an anti-muslim video and not an act of terrorism. >> but for them to go after the u.n. ambassador who had nothing to do with benghazi and was simply making a presentation based on intelligence she had received and to besmirch her reputation... is outrageous! >> reporter: senator mccain has vowed to block rice's nomination should the president choose her to replace secretary of state hillary clinton. mccain and graham are also calling for a special watergate- style investigation into the benghazi attack. >> we want to probe everybody involved all the way up to and including the president of the united states. >> this is about the role she play